How much does it cost to ship first class mail

The cost to ship First Class Mail in the United States depends on the weight, size, and destination of the mailpiece. Here are the current rates for First Class Mail:

Letters (1 oz or less)

• Domestic: $0.55
• International: $1.20 (to Canada), $1.30 (to Mexico), and $1.40 (to other countries)

Large Envelopes (1 oz or less)

• Domestic: $0.95
• International: $2.30 (to Canada), $2.50 (to Mexico), and $2.70 (to other countries)

Flats (1 oz or less)

• Domestic: $1.20
• International: $2.90 (to Canada), $3.20 (to Mexico), and $3.50 (to other countries)

Additional Ounces

• Each additional ounce: $0.15 (domestic), $0.20 (international)

Special Services

• Certified Mail: $3.45 (domestic), $6.45 (international)
• Return Receipt: $1.45 (domestic), $2.45 (international)
• Signature Confirmation: $3.45 (domestic), $6.45 (international)

Weight-Based Pricing

• For mailpieces weighing more than 1 oz, the cost is based on the weight of the mailpiece:
  • 2-3 oz: $0.70 (domestic), $1.40 (international)
  • 3-4 oz: $0.85 (domestic), $1.65 (international)
  • 4-5 oz: $1.00 (domestic), $1.90 (international)
  • 5-6 oz: $1.15 (domestic), $2.15 (international)
  • 6-7 oz: $1.30 (domestic), $2.40 (international)
  • 7-8 oz: $1.45 (domestic), $2.65 (international)
  • 8-9 oz: $1.60 (domestic), $2.90 (international)
  • 9-10 oz: $1.75 (domestic), $3.15 (international)

Please note that these rates are subject to change, so it's always a good idea to check the official USPS website for the most up-to-date pricing information.